Reversing valve mechanism.



PATBNTED APR..9, 1907. J. E. ARNOLD. REVERSING VALVE MECHANISM.

APPLICATION FILED DEO. 4, 1905.

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' J. E. ARNOLD.

REVERSLNG VALVE MEoHA-NISM'.

APPLICATION FILED 1320.4, 1905.

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FI'5 E @werden JAMES E. ARNOLD, OF GRAND VIEW, INDIANA.

REVERSING VALVE VIECHANISIVI.

Specification of Letters Patent.

Patented April 9, 1907.

Application led December 4,1905. Serial No, 290,323.

To all when?, t may concer-7L:

l Be it known that I, JAMES E. ARNOLD, a 1 citizen of the United States, residing` at Grand View, in the county of Spencer, State r l l l i of Indiana, have invented certain new and useful Improvements in .Reversing Valve Mechanism 5 and I do hereby declare the following to be a vfull, clear, and exact descripy tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to reversing valve mechanism for steam-engines, and has for its object to provide a valve mechanism ol this nature which shall be eflicient in action and which shall permit of quick reversing ol the engine.

The invention resides in the provision of a novel arrangement of valves in the steam supply and exhaust pipes.

In the accompanying drawings, Figure 1 is a top plan view of an engine, showingl m v valve mechanism applied thereto, the steam supply and exhaust valves being shown in section. Fig. 2 is a horizontal sectional view through the cylinder and steam-chests. Fig. 3 is a section on line 3 3 of Fig. 1. Fig. e is a detail longitudinal section through the steameXhaust pipe.

In the drawings, 5 denotes the engine-cyl'- inder; 6, the piston, and 7 the main shalt which is driven by the engine.

Disposed one on each side of the cylinder 5 are steam-chests S and 9, which have communication therewith by means of pipes 1() and 11 and 12 and 13, respectively. Slidevalves 14 and 1.5 are disposed in the steamchests 8 and 9, respectivel gand comprise each valve-rods 16 and 17 and heads'lS and 19, respectively. The rods 16 and 17 are provided at their outer ends with eccentric-straps 20, in 'which work eccentrics 21 on the shaft 7, thereby providing for the reciprocation of the slide-valves 14 and 15 when the shaft is rotated. The heads 1S and 19 are disposed on the said rods, one adjacent each end ol the steam-chest. v

A steam-supply pipe 22 leads Vfrom the source of supply to the engine and is provided at its end adjacent the engine with branch pipes and 241, which lead, respectively, to the steam-chests S and 9. Branch pipes 25 and 26 lead from the steam-chests S and 9, respectively, and communicate with an exhaust-pipe 27, which leads therefrom.

At the junction of the steam-supply pipe 22 and the branch pipes 23 and 24 is `formed a valve-casing 28, and in the pipes 25 and 26 adjacent their connection with the pipe 27 are ormed valve-casings 2) and 30. The valve-casing 2S is provided with oppostelydisposed valve-seats 31, and valve-casings 29 and 230 with single valve-seats.

Extending laterally from one side olt the cylinder 5 is a bracket-arm 34, to the outer end ol which is pivoted one endv et a reversinglever 35. Pivotally connected to vthe lever 35 at one of its ends are valve rods 36 yand 37, the ormer extending through a stufIng-box 38 in the branch pipe 24 and the latter through a stul'llng-box 39 in the branch pipe 26. A valve 4t() is carried by the inner end ol the valve-rod 36, which is arranged to seat at either end of the valve-casing 28. A valve 41 is carried by the end ol the valverod 37 and works in the valve-casing 29, and disposed upon the said rod 37 and working in the valve-casing 3() is a valve 4:2. A throttle-valve L't3 is provided. at any suitable point in the steam-supply pipe 22.

As shown in the drawings, the steam-inlet is through the branch pipe Z3-to the steamchest 8, and thence through the port 1() to the cylinder 5 at the return stroke of the piston and through the pipe 11 at the forward stroke of the same. In this case the exhaust is through the ports 1.2 and 13, the steamchest E), and the branch pipe 26 to the pipe 27. By shifting the lever in the direction. indicated by the arrow in Fig. 1 it will be seen that the valves will be so moved as to establish the steam-inlet tln'ough the branch pipe 24, the steam-chest 0, and the pipe 12 to the engine on the return stroke ot the piston and through the pipe 13 on the downward stroke ol' the saine. The exhaust in this case is through the pipes l() and 11.

I claim- In a reversing valve mechanism, the combination with an enginecylinder, steamchests arranged at each side of said cylinder, pipes interposed between the ends ol. said steam-chests and said cylinder, and slidevalves in said steam-chests having heads controlling the adjacent orilices o'lf said respective pipes, o'l steam-inlet pipes, a common valve-chamber having commimication with said inlet-pipes, said inlet-pipes communicating with said steam-chests, steam-exhaust pipes leading Ylrom said steam-chests,

a Common valve-chamber communicating l movement of the latter upon actuation ol with said steam-exhaust plpe, valves 1n said said lever.

IO respective chambers adapted to control the In testimony whereof I'ax my signature passage of steam through the respective inlet in presence of tWo Witnesses. and exhaust pipes communicating With said JAMES E. ARNOLD. Chambers, a pivoted lever7 and operative 'Witnessesz connections between said lever and said VALTER B. MILLER7 valves for permitting of the simultaneous LOUIS H. LAMAR. 

